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Document and Entity Information Document	6 Months Ended
Document and Entity Information Document	Jun. 30, 2015	Aug. 13, 2015
Document Information [Line Items]
Entity Registrant Name	Arrhythmia Research Technology Inc /DE/
Entity Central Index Key	0000819689
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		2,786,539dei_EntityCommonStockSharesOutstanding

Consolidated Balance Sheets (unaudited) (USD $)	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 284,774	$ 209,398
Trade accounts receivable, net of allowance for doubtful accounts of $48,000 at June 30, 2015 and $45,000 at December 31, 2014	4,357,896us-gaap_AccountsReceivableNetCurrent	3,536,747us-gaap_AccountsReceivableNetCurrent
Inventory, net	2,490,723hrt_Inventorynetofreserves	2,514,241hrt_Inventorynetofreserves
Prepaid expenses and other current assets	595,960	519,582
Total current assets	7,729,353us-gaap_AssetsCurrent	6,779,968us-gaap_AssetsCurrent
Property, plant and equipment, net	7,669,062us-gaap_PropertyPlantAndEquipmentNet	7,618,901us-gaap_PropertyPlantAndEquipmentNet
Intangible assets, net	137,563	134,022
Other assets	343,555us-gaap_OtherAssetsNoncurrent	570,357us-gaap_OtherAssetsNoncurrent
Total assets	15,879,533us-gaap_Assets	15,103,248us-gaap_Assets
Current liabilities:
Revolving line of credit, current portion	0	2,071,495
Term notes payable, current portion	576,705hrt_Termnotespayablecurrentportion	490,341hrt_Termnotespayablecurrentportion
Accounts payable	2,182,438us-gaap_AccountsPayableCurrent	1,857,156us-gaap_AccountsPayableCurrent
Accrued expenses & other current liabilities	610,014us-gaap_OtherLiabilitiesCurrent	405,975us-gaap_OtherLiabilitiesCurrent
Customer deposits	113,178us-gaap_CustomerDepositsCurrent	98,110us-gaap_CustomerDepositsCurrent
Deferred revenue, current	293,153us-gaap_DeferredRevenueCurrent	228,363us-gaap_DeferredRevenueCurrent
Liabilities from discontinued operations, current	0	320,056
Total current liabilities	3,775,488us-gaap_LiabilitiesCurrent	5,471,496us-gaap_LiabilitiesCurrent
Long-term liabilities:
Revolving line of credit, non-current portion	2,391,495	0
Term notes payable, non-current portion	1,418,096hrt_Termnotespayablenoncurrentportion	1,330,755hrt_Termnotespayablenoncurrentportion
Subordinated promissory notes	459,294us-gaap_SubordinatedLongTermDebt	445,452us-gaap_SubordinatedLongTermDebt
Deferred revenue, non-current	360,811us-gaap_DeferredRevenueNoncurrent	610,430us-gaap_DeferredRevenueNoncurrent
Total long-term liabilities	4,629,696us-gaap_LiabilitiesNoncurrent	2,386,637us-gaap_LiabilitiesNoncurrent
Total liabilities	8,405,184us-gaap_Liabilities	7,858,133us-gaap_Liabilities
Commitments and Contingencies
Shareholders' equity:
Preferred stock, $1 par value; 2,000,000 shares authorized, none issued	0us-gaap_PreferredStockValue	0us-gaap_PreferredStockValue
Common stock, $.01 par value; 10,000,000 shares authorized; 3,926,941 issued; 2,786,539 outstanding at June 30, 2015 and 3,926,491 issued, 2,778,339 outstanding at December 31, 2014	39,265us-gaap_CommonStockValue	39,265us-gaap_CommonStockValue
Additional paid-in-capital	11,361,959us-gaap_AdditionalPaidInCapital	11,336,693us-gaap_AdditionalPaidInCapital
Treasury stock at cost, 1,139,952 shares at June 30, 2015 and 1,148,152 shares at December 31, 2014	(3,110,701)us-gaap_TreasuryStockValue	(3,133,883)us-gaap_TreasuryStockValue
Accumulated other comprehensive income	0	42,502
Accumulated deficit	(816,174)	(1,039,462)
Total shareholders’ equity	7,474,349us-gaap_StockholdersEquity	7,245,115us-gaap_StockholdersEquity
Total liabilities and shareholders’ equity	$ 15,879,533	$ 15,103,248

Consolidated Balance Sheets (Parentheticals) (Parentheticals) (USD $)	Jun. 30, 2015	Dec. 31, 2014
Consolidated Balance Sheet Parenthetical [Line Items]
Allowance for doubtful accounts receivable, current	$ 48,000	$ 45,000
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	2,000,000us-gaap_PreferredStockSharesAuthorized	2,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000us-gaap_CommonStockSharesAuthorized	10,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	3,926,491us-gaap_CommonStockSharesIssued	3,926,491us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	2,786,539us-gaap_CommonStockSharesOutstanding	2,778,339us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	1,139,952us-gaap_TreasuryStockShares	1,148,152us-gaap_TreasuryStockShares

Consolidated Statements of Operations (unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net sales	$ 5,659,094us-gaap_SalesRevenueNet	$ 6,253,757us-gaap_SalesRevenueNet	$ 11,517,436us-gaap_SalesRevenueNet	$ 12,283,600us-gaap_SalesRevenueNet
Cost of sales	4,626,940us-gaap_CostOfGoodsAndServicesSold	5,119,734us-gaap_CostOfGoodsAndServicesSold	9,688,886us-gaap_CostOfGoodsAndServicesSold	9,838,291us-gaap_CostOfGoodsAndServicesSold
Gross profit	1,032,154us-gaap_GrossProfit	1,134,023us-gaap_GrossProfit	1,828,550us-gaap_GrossProfit	2,445,309us-gaap_GrossProfit
Selling and marketing	262,609us-gaap_SellingAndMarketingExpense	240,408us-gaap_SellingAndMarketingExpense	520,581us-gaap_SellingAndMarketingExpense	532,080us-gaap_SellingAndMarketingExpense
General and administrative	525,577us-gaap_GeneralAndAdministrativeExpense	543,235us-gaap_GeneralAndAdministrativeExpense	1,173,804us-gaap_GeneralAndAdministrativeExpense	1,137,866us-gaap_GeneralAndAdministrativeExpense
Research and development	62,224us-gaap_ResearchAndDevelopmentExpense	85,694us-gaap_ResearchAndDevelopmentExpense	154,785us-gaap_ResearchAndDevelopmentExpense	182,521us-gaap_ResearchAndDevelopmentExpense
Total operating expenses	850,410us-gaap_OperatingExpenses	869,337us-gaap_OperatingExpenses	1,849,170us-gaap_OperatingExpenses	1,852,467us-gaap_OperatingExpenses
Income (loss) from continuing operations	181,744us-gaap_OperatingIncomeLoss	264,686us-gaap_OperatingIncomeLoss	(20,620)us-gaap_OperatingIncomeLoss	592,842us-gaap_OperatingIncomeLoss
Other income (expense):
Interest expense	(69,840)us-gaap_InterestExpense	(70,529)us-gaap_InterestExpense	(135,533)us-gaap_InterestExpense	(140,678)us-gaap_InterestExpense
Other income (expense), net	3,322us-gaap_OtherNonoperatingIncomeExpense	46,687us-gaap_OtherNonoperatingIncomeExpense	16,831us-gaap_OtherNonoperatingIncomeExpense	48,998us-gaap_OtherNonoperatingIncomeExpense
Total other expense, net	(66,518)us-gaap_OtherExpenses	(23,842)us-gaap_OtherExpenses	(118,702)us-gaap_OtherExpenses	(91,680)us-gaap_OtherExpenses
Income (loss) from continuing operations before income taxes	115,226	240,844	(139,322)	501,162
Income tax provision	0us-gaap_IncomeTaxExpenseBenefit	1,030us-gaap_IncomeTaxExpenseBenefit	0us-gaap_IncomeTaxExpenseBenefit	2,207us-gaap_IncomeTaxExpenseBenefit
Net income (loss) from continuing operations	115,226	239,814	(139,322)	498,955
Discontinued Operations:
Income (loss) from discontinued operations, net of tax provision of $0 for the three and six months ended June 30, 2015 and 2014	0	646	362,610	(1,779)
Net income	$ 115,226us-gaap_NetIncomeLoss	$ 240,460us-gaap_NetIncomeLoss	$ 223,288us-gaap_NetIncomeLoss	$ 497,176us-gaap_NetIncomeLoss
Earnings (loss) per share - basic
Continuing operations	$ 0.04	$ 0.09	$ (0.05)	$ 0.18
Discontinued operations	$ 0.00	$ 0.00	$ 0.13	$ 0.00
Earnings per share - basic	$ 0.04us-gaap_EarningsPerShareBasic	$ 0.09us-gaap_EarningsPerShareBasic	$ 0.08us-gaap_EarningsPerShareBasic	$ 0.18us-gaap_EarningsPerShareBasic
Earnings (loss) per share - diluted
Continuing operations	$ 0.04	$ 0.09	$ (0.05)	$ 0.18
Discontinued operations	$ 0.00	$ 0.00	$ 0.13	$ 0.00
Earnings per share - diluted	$ 0.04us-gaap_EarningsPerShareDiluted	$ 0.09us-gaap_EarningsPerShareDiluted	$ 0.08us-gaap_EarningsPerShareDiluted	$ 0.18us-gaap_EarningsPerShareDiluted
Weighted average common shares outstanding - basic	2,781,826	2,723,582	2,780,420	2,722,914
Weighted average common shares outstanding - diluted	2,848,302	2,815,578	2,881,438	2,798,163

Consolidated Statements of Operations (Parentheticals) (Parentheticals) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of operations parentheticals [Abstract]
Tax benefit, discontinued operations	$ 0hrt_TaxBenefitDiscontinuedOperations	$ 0hrt_TaxBenefitDiscontinuedOperations	$ 0hrt_TaxBenefitDiscontinuedOperations	$ 0hrt_TaxBenefitDiscontinuedOperations

Consolidated Statements of Cash Flows (unaudited) (USD $)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 223,288us-gaap_NetIncomeLoss	$ 497,176us-gaap_NetIncomeLoss
Income (loss) from discontinued operations	(362,610)	1,779
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Gain on sale of property, plant and equipment	(14,729)	(24,500)
Depreciation and amortization	730,013	750,616
Non-cash interest expense	13,842hrt_Noncashinterestexpense	13,842hrt_Noncashinterestexpense
Change in allowance for doubtful accounts	3,000	10,000
Share-based compensation expense	19,888	26,548
Changes in operating assets and liabilities:
Accounts receivable	(824,149)	(83,113)
Inventories	23,518us-gaap_IncreaseDecreaseInInventories	(752,266)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	(76,378)	(107,017)
Other non-current assets	226,802	66,128
Accounts payable	325,282	(397,948)
Accrued expenses and other current liabilities	283,897	879,531
Other non-current liabilities	(249,619)	(51,060)
Net cash provided by (used in) operating activities of continuing operations	322,045	829,716
Net cash provided by (used in) operating activites of discontinued operations	0	(1,509)
Net cash provided by (used in) operating activities	322,045	828,207
Cash flows from investing activities:
Purchases of property, plant and equipment	(784,157)	(834,971)
Proceeds from sale of property, plant and equipment	20,700	24,500
Cash paid for patents and trademarks	(5,528)hrt_CashPaidForPatentsAndTrademarks	(2,613)hrt_CashPaidForPatentsAndTrademarks
Net cash provided by (used in) investing activities from continuing operations	(768,985)	(813,084)
Net cash provided by (used in) investing activities from discontinued operations	0	0
Net cash provided by (used in) investing activities	(768,985)	(813,084)
Cash flows from financing activities:
Proceeds from (payments on) revolving line of credit, net	320,000	(478,000)
Proceeds from equipment line of credit	415,785hrt_Proceedsfromequipmentlineofcredit	116,905hrt_Proceedsfromequipmentlineofcredit
Payments on term notes payable	(242,080)hrt_Paymentsontermnotespayable	(198,854)hrt_Paymentsontermnotespayable
Proceeds from stock option exercises	28,611	25,575
Net cash provided by (used in) financing activities from continuing operations	522,316	(534,374)
Net cash provided by (used in) financing activities from discontinued operations	0	0
Net cash provided by (used in) financing activities	522,316	(534,374)
Net increase (decrease) in cash and cash equivalents	75,376	(519,251)
Cash and cash equivalents, beginning of period	209,398us-gaap_Cash	751,275us-gaap_Cash
Cash and cash equivalents, end of period	284,774us-gaap_Cash	232,024us-gaap_Cash
Less: cash and cash equivalents of discontinued operations at end of period	0	0
Cash and cash equivalents of continuing operations at end of period	284,774	232,024
Supplemental Cash Flow Information (unaudited)
Cash paid for interest	111,639us-gaap_InterestPaid	119,229us-gaap_InterestPaid
Non-cash activities:
Equipment line of credit converted to term notes payable	415,785	740,999
Reduction of restricted cash offset by performance guarantee	$ 0	$ 975,430

Basis of Presentation (Notes)	6 Months Ended
Basis of Presentation (Notes)	Jun. 30, 2015
Basis of presentation [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements (the "financial statements") include the accounts of Arrhythmia Research Technology, Inc.^® (“ART”) and its subsidiary, Micron Products, Inc.^® ("Micron" and together with ART, the “Company”). ART discontinued operations of its wholly-owned Pennsylvania subsidiary, RMDDxUSA Corp. (“RMDDxUSA”) and that subsidiary’s Prince Edward Island subsidiary, RMDDx Corporation (“RMDDx” and collectively with RMDDxUSA,“WirelessDx”) in the third quarter of 2012. In May 2014, RMDDxUSA filed for bankruptcy and the Chapter 7 discharge order was issued on March 20, 2015 and the case was closed (see Note 10). The WirelessDx results are presented herein as discontinued operations. All intercompany balances and transactions have been eliminated in consolidation. The unaudited interim consolidated financial statements and related notes have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC"). Accordingly, certain information and footnote disclosures normally included in complete financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been omitted pursuant to such rules and regulations. These financial statements and related notes should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014 filed with the SEC on March 20, 2015. Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. The Company's balance sheet at December 31, 2014 has been derived from the audited financial statements at that date, but does not include all the information and footnotes required by GAAP for complete financial statements. The information presented reflects, in the opinion of the management of the Company, all adjustments necessary for a fair presentation of the financial results for the interim periods presented. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References+ Details

Earnings per Share (Notes)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share ("EPS")

Basic earnings (loss) per share is computed by dividing net income (loss) available to common shareholders by the weighted average number of common shares outstanding. The computation of diluted earnings (loss) per share is similar to the computation of basic earnings (loss) per share except that the denominator is increased to include the average number of additional common shares that would have been outstanding if the dilutive potential common shares had been issued. In addition, the numerator is adjusted for any changes in net income (loss) that would result from the assumed conversions of those potential shares.

The following table presents the calculation of both basic and diluted EPS:



	Three months ended June 30,				Six months ended June 30,
	2015		2014		2015			2014
Income (loss) from continuing operations	$	115,226	$	239,814	$	(139,322	)	$	498,955
Income (loss) from discontinued operations, net of tax	—		646		362,610			(1,779		)
Net income available to common shareholders	$	115,226	$	240,460	$	223,288		$	497,176

Basic EPS:
Weighted average common shares outstanding	2,781,826		2,723,582		2,780,420			2,722,914

Income (loss) per share - basic
Continuing operations	$	0.04	$	0.09	$	(0.05	)	$	0.18
Discontinued operations	—		—		0.13			—
Consolidated basic EPS	$	0.04	$	0.09	$	0.08		$	0.18

Diluted EPS:
Weighted average common shares outstanding	2,781,826		2,723,582		2,780,420			2,722,914
Assumed conversion of net common shares issuable under stock option plans	33,546		53,492		68,088			44,028
Assumed conversion of net common shares issuable under warrants	32,930		38,504		32,930			31,221
Weighted average common and common equivalent shares outstanding, diluted	2,848,302		2,815,578		2,881,438			2,798,163

Income (loss) per share - diluted
Continuing operations	$	0.04	$	0.09	$	(0.05	)	$	0.18
Discontinued operations	—		—		0.13			—
Consolidated diluted EPS	$	0.04	$	0.09	$	0.08		$	0.18

Inventories

6 Months Ended

Jun. 30, 2015

Inventories [Abstract]

Inventories, net

Inventories consist of the following:



	June 30, 2015		December 31, 2014
Raw materials	$	831,795	$	873,306
Work-in-process	383,282		370,220
Finished goods	1,275,646		1,270,715
Total	$	2,490,723	$	2,514,241

The cost of silver in inventory that is included in raw materials, work-in-process and finished goods had an estimated cost of $405,541 and $439,800 as of June 30, 2015 and December 31, 2014, respectively.

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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Property, Plant and Equipment, Net

6 Months Ended

Jun. 30, 2015

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, Net

Property, plant and equipment consist of the following:



	Asset Lives (in years)			June 30, 2015			December 31, 2014
Machinery and equipment	3	to	15	$	14,848,484		$	14,608,949
Building and improvements	5	to	25	4,499,899			4,360,114
Vehicles	3	to	5	90,713			90,713
Furniture, fixtures, computers and software	3	to	5	1,426,071			1,349,931
Land				202,492			202,492
Construction in progress				697,926			568,234
Total property, plant and equipment				21,765,585			21,180,433
Less: accumulated depreciation				(14,096,523		)	(13,561,532		)
Property, plant and equipment, net				$	7,669,062		$	7,618,901

For the three months ended June 30, 2015 and 2014, the Company recorded depreciation expense of $372,637 and $364,264, respectively. For the six months ended June 30, 2015 and 2014, the Company recorded depreciation expense of $728,025 and $741,779, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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Intangible Assets, Net (Notes)

6 Months Ended

Jun. 30, 2015

Intangible Assets, Net [Abstract]

Intangibles Assets, Net

Intangible Assets, Net

The Company assesses the impairment of long-lived assets and intangible assets with finite lives annually or whenever events or changes in circumstances indicate that the carrying value may not be fully recoverable. For the six months ended June 30, 2015, no impairment was required.

Intangible assets consist of the following:



		June 30, 2015						December 31, 2014
	Estimated Useful Life (in years)	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Patents and trademarks	11	$	414,437	$	395,250	$	19,187	$	414,436	$	394,371	$	20,065
Patents and trademarks pending	—	102,975		—		102,975		97,447		—		97,447
Trade names	7	33,250		17,849		15,401		33,250		16,740		16,510
Total intangible assets		$	550,662	$	413,099	$	137,563	$	545,133	$	411,111	$	134,022

For the three and six months ended June 30, 2015 and 2014, the Company recorded amortization expense of $994 and $1,988, respectively.

Debt

6 Months Ended

Jun. 30, 2015

Debt [Abstract]

Debt

The following table sets forth the items which comprise debt for the Company:



	June 30, 2015		December 31, 2014
Revolving line of credit	$	2,391,495	$	2,071,495
Subordinated promissory notes	$	459,294	$	445,452

Term notes payable:
Commercial term loan	$	863,612	$	1,009,977
Equipment term loans	987,574		640,734
Equipment notes	143,615		170,385
Total term notes payable	$	1,994,801	$	1,821,096

Total Debt	$	4,845,590	$	4,338,043

Bank Debt

The revolving line of credit (the "revolver"), commercial term loan, two equipment term loans and an equipment line of credit are all under the terms of a multi-year credit facility with a bank as detailed below. The bank facility contains both financial and non-financial covenants, all of which the Company is in compliance with at June 30, 2015.

Revolver

The revolver provides for borrowings up to 80% of eligible accounts receivable and 50% of eligible raw materials inventory. The interest rate on the revolver is calculated at the bank's prime rate plus 0.25% (3.50% at June 30, 2015). The original maturity date of the revolver was June 30, 2015, therefore, as of December 31, 2014 the balance of the revolver was classified as a current liability. In June 2015, the revolver was extended for an additional two-year period maturing June 30, 2017 and is therefore classified as a long-term liability on the Company's balance sheet at June 30, 2015.

Commercial term loan

The commercial term loan has a five year term with a maturity date in March 2018. The interest rate on the loan is a fixed 4.25% per annum, and requires monthly payments of approximately $28,000.

Equipment line of credit and equipment term loans

The original equipment line of credit allowed for advances of up to $1.0 million and included a one-year draw period during which payments were interest only. The draw period ended March 29, 2014 and the then outstanding balance on the equipment line of credit of $740,999 was converted to an equipment term loan with a five-year term, maturing on of March 29, 2019. The equipment term loan requires monthly payments of approximately $14,000, consisting of principal and interest at a fixed rate of 4.65%.

On June 26, 2014, the Company entered into an equipment line of credit that allowed for advances of up to $1.0 million and included a one-year draw period during which payments were interest only. The draw period ended June 26, 2015 and the then outstanding balance on the equipment line of credit of $415,785 was converted to an equipment term loan with a five-year term, maturing on of June 26, 2020. The equipment term loan requires monthly payments of approximately $8,000, consisting of principal and interest at a fixed rate of 4.67%.

On June 19, 2015, the Company entered into a new equipment line of credit for $1.0 million under the Company's multi-year credit facility. At June 30, 2015, no amounts had been drawn on the new equipment line of credit. The term of this equipment line of credit is six years, maturing on June 19, 2021, inclusive of a maximum one-year draw period. Repayment shall consist of monthly interest only payments, equal to the bank's prime rate plus 0.25% as to each advance commencing on the date of the loan through the earlier of: (i) one year from the date of the loan or (ii) the date upon which the equipment line of credit is fully advanced (the “Conversion Date”). On the Conversion Date, principal and interest payments will be due and payable monthly in an amount sufficient to pay the loan in full based upon an amortization schedule commensurate with the remaining term of the loan.

Other Debt

Equipment notes

In January 2013, the Company entered into two equipment notes totaling $272,500 with a financing company to acquire production equipment. The notes bear interest at the fixed rate of 4.66% and require monthly payments of principal and interest of approximately $5,000 over a five year term maturing in January 2018.

Subordinated promissory notes

In December 2013, the Company completed a private offering in which the Company sold an aggregate of $500,000 in subordinated promissory notes. The notes are unsecured and require quarterly interest-only payments at a rate of 10% per annum. On the second anniversary following issuance, the interest rate increases to 12% per annum. The notes mature in December 2016 at which point the outstanding balance is due in full. The subordinated promissory notes may be prepaid by the Company at any time following the first anniversary thereof without penalty. The notes are subordinated to all indebtedness of the Company pursuant to the bank credit facility.

In connection with the subordinated promissory notes, the Company issued warrants to purchase the Company's common stock at $3.51 per share. The warrants expire in December 2016. The proceeds were allocated between the notes and warrants on a relative fair value basis resulting in $416,950 allocated to the notes and $83,050 allocated to the warrants as part of Additional-Paid-in-Capital. The total discount on the notes is being recognized as non-cash interest expense over the term of the notes. For the three and six months ended June 30, 2015 and 2014, the Company recorded $6,921 and $13,842, respectively, of non-cash interest expense related to the amortization of the discount. The unamortized discount which is net against the outstanding balance of the subordinated promissory notes is $40,706 at June 30, 2015 and $54,548 at December 31, 2014.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References+ Details

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2015
Income Taxes [Abstract]
Income Taxes	Income Taxes The tax provisions for the three and six months ended June 30, 2015 and 2014 are attributable to the U.S. federal and state income taxes on our continuing operations. The Company has a full valuation allowance against its deferred tax assets at June 30, 2015 and December 31, 2014. Management expects to reevaluate the allowance on its deferred tax assets at December 31, 2015. The Company has federal and state net operating loss carryforwards totaling $7,752,000 and $7,202,000, respectively, which begin to expire in 2030. The Company also had federal and state tax credit carryovers of $243,000 and $281,000 respectively. The federal and state tax credits begin to expire in 2026 and 2015, respectively. During the first quarter of 2015, the Company's subsidiary, RMDDxUSA, was formally discharged in its bankruptcy proceedings. The tax attributes associated with this subsidiary expired upon the finalization of the bankruptcy. As a result, the Company's available foreign and state net operating loss carryforwards have been reduced by $1,039,000 and $4,315,000, respectively.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2015
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal matters In the ordinary course of its business, the Company is involved in various legal proceedings involving a variety of matters. The Company does not believe there are any pending legal proceedings that will have a material impact on the Company’s financial position or results of operations. Off-balance sheet arrangements In 2014, the Company entered into two operating leases for office equipment. Lease expense under all operating leases was approximately $1,822 for the three months ended June 30, 2015 and $3,644 for the six months ended June 30, 2015 and $0 for the same periods in 2014.

Stock Options & Share-based Incentive Plan

6 Months Ended

Jun. 30, 2015

Stock Options [Abstract]

Stock Options & Share-based Incentive Plan

Stock Options and Share-Based Incentive Plan

Options

The following table sets forth the stock option transactions for the six months ended June 30, 2015:



	Number of options		Weighted average Exercise Price		Weighted average remaining contractual term (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2014	165,800		$	5.58	6.09	$	305,124
Granted	25,000		7.74
Exercised	(8,200	)	3.49
Forfeited	(7,500	)	6.45
Expired	—		—
Outstanding at June 30, 2015	175,100		5.95		5.62	$	277,863

Exercisable at June 30, 2015	102,600		$	6.01	4.16	$	167,218
Exercisable at December 31, 2014	74,400		$	6.07	4.75	$	119,342

For the six months ended June 30, 2015 and 2014, share-based compensation expense related to stock options amounted to $19,888 and $26,548, respectively, and is included in general and administrative expenses.

For the six months ended June 30, 2015, 25,000 options were granted, 7,500 options were forfeited. Additionally, 8,200 options were exercised generating proceeds of $28,611.

For the six months ended June 30, 2014, there we no new grants and 56,500 options expired. Additionally, 9,600 options were exercised generating proceeds of $25,575.

Warrants

For the six months ended June 30, 2015 and 2014, there were no warrants exercised. As of June 30, 2015, 70,000 warrants remain unexercised.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Discontinued Operations	6 Months Ended
Discontinued Operations	Jun. 30, 2015
Discontinued Operations [Abstract]
Discontinued Operations	Discontinued Operations On May 8, 2014, RMDDxUSA filed a voluntary petition for relief under Chapter 7 (Liquidation) of the United States Bankruptcy Code in the District of Massachusetts. A trustee was assigned to review the assets and liabilities of the company. At December 31, 2014, there were no assets and $320,056 of liabilities remaining on the balance sheet. On March 20, 2015, the Chapter 7 discharge order was issued by the assigned trustee and the case was closed. For the three months and six months ended June 30, 2015, net income of $0 and $362,610, respectively, net of tax, was recorded from discontinued operations as a result of the write off of the remaining liabilities of $320,056 and the reversal of other comprehensive income of $42,502 from cumulative translation adjustments from RMDDx Corporation.

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

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+ Details

Subsequent Events (Notes)	6 Months Ended
Subsequent Events (Notes)	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events Appointment of Director On July 22, 2015, the Company's Board of Directors appointed Mr. Marco F. Benedetti to serve as a director of the Company, effective July 22, 2015. A description of Mr. Benedetti's background can be found in the Current Report on Form 8-K filed on July 23, 2015. Amendment to Certificate of Incorporation At the Company's Annual Meeting on July 1, 2015, the Shareholders approved an amendment to the Company's Certificate of Incorporation to revise the terms of the 2,000,000 shares of preferred stock, $1.00 par value, to "blank check" preferred stock $0.001 par value ("Blank Check Preferred") in order to simplify the current terms of the 2,000,000 shares of Serial Preferred Stock ("Serial Preferred Stock") but not to otherwise affect the current authority of the Board to issue up to 2,000,000 shares of the Serial Preferred Stock. The Amendment became effective upon the filing of the Certificate of Amendment with the Delaware Secretary of State which was filed on July 10, 2015.

Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings per Share

The following table presents the calculation of both basic and diluted EPS:



	Three months ended June 30,				Six months ended June 30,
	2015		2014		2015			2014
Income (loss) from continuing operations	$	115,226	$	239,814	$	(139,322	)	$	498,955
Income (loss) from discontinued operations, net of tax	—		646		362,610			(1,779		)
Net income available to common shareholders	$	115,226	$	240,460	$	223,288		$	497,176

Basic EPS:
Weighted average common shares outstanding	2,781,826		2,723,582		2,780,420			2,722,914

Income (loss) per share - basic
Continuing operations	$	0.04	$	0.09	$	(0.05	)	$	0.18
Discontinued operations	—		—		0.13			—
Consolidated basic EPS	$	0.04	$	0.09	$	0.08		$	0.18

Diluted EPS:
Weighted average common shares outstanding	2,781,826		2,723,582		2,780,420			2,722,914
Assumed conversion of net common shares issuable under stock option plans	33,546		53,492		68,088			44,028
Assumed conversion of net common shares issuable under warrants	32,930		38,504		32,930			31,221
Weighted average common and common equivalent shares outstanding, diluted	2,848,302		2,815,578		2,881,438			2,798,163

Income (loss) per share - diluted
Continuing operations	$	0.04	$	0.09	$	(0.05	)	$	0.18
Discontinued operations	—		—		0.13			—
Consolidated diluted EPS	$	0.04	$	0.09	$	0.08		$	0.18

Inventories (Tables)

6 Months Ended

Jun. 30, 2015

Inventory [Abstract]

Inventories

Inventories consist of the following:



	June 30, 2015		December 31, 2014
Raw materials	$	831,795	$	873,306
Work-in-process	383,282		370,220
Finished goods	1,275,646		1,270,715
Total	$	2,490,723	$	2,514,241

Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, plant and equipment consist of the following:



	Asset Lives (in years)			June 30, 2015			December 31, 2014
Machinery and equipment	3	to	15	$	14,848,484		$	14,608,949
Building and improvements	5	to	25	4,499,899			4,360,114
Vehicles	3	to	5	90,713			90,713
Furniture, fixtures, computers and software	3	to	5	1,426,071			1,349,931
Land				202,492			202,492
Construction in progress				697,926			568,234
Total property, plant and equipment				21,765,585			21,180,433
Less: accumulated depreciation				(14,096,523		)	(13,561,532		)
Property, plant and equipment, net				$	7,669,062		$	7,618,901

Intangible Assets, Net (Tables)

6 Months Ended

Jun. 30, 2015

Intangible Assets, Net [Abstract]

Intangibles Assets, Net

Intangible assets consist of the following:



		June 30, 2015						December 31, 2014
	Estimated Useful Life (in years)	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Patents and trademarks	11	$	414,437	$	395,250	$	19,187	$	414,436	$	394,371	$	20,065
Patents and trademarks pending	—	102,975		—		102,975		97,447		—		97,447
Trade names	7	33,250		17,849		15,401		33,250		16,740		16,510
Total intangible assets		$	550,662	$	413,099	$	137,563	$	545,133	$	411,111	$	134,022

Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt [Abstract]

Debt



	June 30, 2015		December 31, 2014
Revolving line of credit	$	2,391,495	$	2,071,495
Subordinated promissory notes	$	459,294	$	445,452

Term notes payable:
Commercial term loan	$	863,612	$	1,009,977
Equipment term loans	987,574		640,734
Equipment notes	143,615		170,385
Total term notes payable	$	1,994,801	$	1,821,096

Total Debt	$	4,845,590	$	4,338,043

Stock Options & Share-based Incentive Plan (Tables)

6 Months Ended

Jun. 30, 2015

Stock Options [Abstract]

Stock Option Transactions

The following table sets forth the stock option transactions for the six months ended June 30, 2015:



	Number of options		Weighted average Exercise Price		Weighted average remaining contractual term (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2014	165,800		$	5.58	6.09	$	305,124
Granted	25,000		7.74
Exercised	(8,200	)	3.49
Forfeited	(7,500	)	6.45
Expired	—		—
Outstanding at June 30, 2015	175,100		5.95		5.62	$	277,863

Exercisable at June 30, 2015	102,600		$	6.01	4.16	$	167,218
Exercisable at December 31, 2014	74,400		$	6.07	4.75	$	119,342

Earnings per Share - (Details) (USD $)	3 Months Ended		6 Months Ended
Earnings per Share - (Details) (USD $)	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 115,226	$ 239,814	$ (139,322)	$ 498,955
Income (loss) from discontinued operations, net of tax	0	646	362,610	(1,779)
Net income available to common shareholder	$ 115,226us-gaap_NetIncomeLoss	$ 240,460us-gaap_NetIncomeLoss	$ 223,288us-gaap_NetIncomeLoss	$ 497,176us-gaap_NetIncomeLoss
Basic EPS:
Weighted average of common shares outstanding	2,781,826	2,723,582	2,780,420	2,722,914
Income (loss) per share - basic
Continuing operations	$ 0.04	$ 0.09	$ (0.05)	$ 0.18
Discontinued operations	$ 0.00	$ 0.00	$ 0.13	$ 0.00
Consolidated basic EPS	$ 0.04us-gaap_EarningsPerShareBasic	$ 0.09us-gaap_EarningsPerShareBasic	$ 0.08us-gaap_EarningsPerShareBasic	$ 0.18us-gaap_EarningsPerShareBasic
Diluted EPS:
Weighted average of common shares outstanding	2,781,826	2,723,582	2,780,420	2,722,914
Assumed conversion of net common shares issuable under stock options	33,546	53,492	68,088	44,028
Assumed conversion of net common shares issuable under warrants	32,930	38,504	32,930	31,221
Weighted average common and common equivalent shares outstanding, diluted	2,848,302	2,815,578	2,881,438	2,798,163
Income (loss) per share - diluted
Continuing operations	$ 0.04	$ 0.09	$ (0.05)	$ 0.18
Discontinued operations	$ 0.00	$ 0.00	$ 0.13	$ 0.00
Consolidated diluted EPS	$ 0.04us-gaap_EarningsPerShareDiluted	$ 0.09us-gaap_EarningsPerShareDiluted	$ 0.08us-gaap_EarningsPerShareDiluted	$ 0.18us-gaap_EarningsPerShareDiluted

Inventories - (Details) (USD $)	Jun. 30, 2015	Dec. 31, 2014
Inventories
Raw materials	$ 831,795	$ 873,306
Work-in-process	383,282	370,220
Finished goods	1,275,646	1,270,715
Total	2,490,723hrt_Inventorynetofreserves	2,514,241hrt_Inventorynetofreserves
Silver inventory	$ 405,541hrt_Silverinventory	$ 439,800hrt_Silverinventory

Property, Plant and Equipment, Net - (Details) (USD $)	3 Months Ended
Property, Plant and Equipment, Net - (Details) (USD $)	Mar. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment
Machinery and equipment		$ 14,848,484us-gaap_MachineryAndEquipmentGross	$ 14,608,949us-gaap_MachineryAndEquipmentGross
Building and improvements		4,499,899us-gaap_BuildingsAndImprovementsGross	4,360,114us-gaap_BuildingsAndImprovementsGross
Vehicles		90,713hrt_VehiclesGross	90,713hrt_VehiclesGross
Furniture, fixtures, computers and software		1,426,071	1,349,931
Land		202,492us-gaap_Land	202,492us-gaap_Land
Construction in progress		697,926us-gaap_ConstructionInProgressGross	568,234us-gaap_ConstructionInProgressGross
Total property, plant and equipment		21,765,585us-gaap_PropertyPlantAndEquipmentGross	21,180,433us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation		(14,096,523)	(13,561,532)
Property, plant and equipment, net		$ 7,669,062us-gaap_PropertyPlantAndEquipmentNet	$ 7,618,901us-gaap_PropertyPlantAndEquipmentNet
Machinery and equipment, minimum
Property, Plant and Equipment
Useful life	3 years
Building and improvements, minimum
Property, Plant and Equipment
Useful life	5 years
Vehicles, minimum
Property, Plant and Equipment
Useful life	3 years
Furniture, Fixtures, computers, and software, minimum
Property, Plant and Equipment
Useful life	3 years
Machinery and equipment, maximum
Property, Plant and Equipment
Useful life	15 years
Building and improvements, maximum
Property, Plant and Equipment
Useful life	25 years
Vehicles, maximum
Property, Plant and Equipment
Useful life	5 years
Furniture, fixtures, computers and software, maximum
Property, Plant and Equipment
Useful life	5 years

hrt-20150630